What’s your favorite volume measure? Mine’s 1/2 cup or 125 ml. So handy.

@Melatonin@lemmy.dbzer0.com · 3M

What’s your favorite volume measure? Mine’s 1/2 cup or 125 ml. So handy.

Deconceptualist · 3M

1 mL of pure water weighs exactly 1 g at 20 °C and 1 atm pressure :) It’s a defined standard, useful for calibrating other things.

Xavienth · 3M

The definition was actually for 4 °C, the point at which water is most dense. At 20 °C the density of water is about 0.997 g/mL. However, we don’t use water to define the metric system anymore, so even at 4 °C - or more precisely 3.983035(670) °C - water is not exactly 1 g/mL.